Luminaire post-top mount



FIG. 1 is a perspective view of a luminaire post-top mount showing the design;

FIG. 2 is a side view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a bottom view thereof.

The broken lines showing the post, housing, and lens of the luminaire are for the purpose of illustrating the environment of the design and form no part of the claimed design. 

The ornamental design for a luminaire post-top mount, as shown and described. 